ArmaLaser HK USP Full Size TR7G Green Laser with Grip Activation Extremely bright 520nm Green Laser with grip activation. Just grasp pistol normally to turn laser on. Custom designed fit for HK USP Full Size. Will not fit HK USP Compact. Green laser sight is brighter than red especially for daytime use. Adjustable laser, battery door, master kill switch. Made from DuPont Zytel polymer pistol material. Designed, assembled in Florida, USA. Patented. Ultra reliable electronics. Simple installation. Each TR unit can be adjusted to fire either a <span class="a-text-bold">steady beam</span> or a <span class="a-text-bold">pulsing beam</span> at your preference. <span class="a-text-bold">Included hex key</span> can be used to adjust laser for accuracy. Convenient<span class="a-text-bold"> battery door</span> means never having to re-adjust laser after a battery charge. <span class="a-text-bold">Master power switch</span> allows you to shut everything off for iron-sights practice and long-term storage.